*{margin: 0;padding: 0;border: 0;list-style: none;}

.banner{
    width: 500px;
    height: 300px;
    margin: 100px auto;
    border: 1px solid #000;
}

ul{
    height: 60px;
    line-height: 60px;
    display: flex;
    text-align: center;
    justify-content: space-between;
}

ul li{
    height: 60px;
    width: 30%;
    background: #efefef;
}

ul li.active{
    background: darkred;
    color: #fff;
}

ol li{
    height: 240px;
    background: darkred;
    text-align: center;
    line-height: 240px;
    color: #fff;
    display: none;
}

ol li.active{
    display: block;
}
